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1, Introduction to Unsafe class If you have seen the source code of JUC, I believe you will not be unfamiliar with the Unsafe class. The bottom core of the whole JUC is the Unsafe class. The Unsafe class is located in sun A class under misc package, which is a tool class (underlying c + + implementation) provided by jdk to directly access oper ...

This article is a personal note based on the video of crazy God on bilibili 1.Spring 1.1 INTRODUCTION Spring framework is an open source J2EE application framework. It is a lightweight container for managing the life cycle of bean s. It solves many common problems encountered by developers in J2EE development. In short, the purpose of Spr ...

Refer to Niuke advanced project tutorial 1. Functional requirements for displaying login information Functions to be realized: Users should display different header information when accessing the page in two states: not logged in and logged in That is, not logged in status: Visit the home page, with login and registration ...

1. Basic concepts Polymorphisms fall into two categories Static polymorphism: function overloading and operator overloading belong to static polymorphism and reuse functionsDynamic polymorphism: derived classes and virtual functions implement runtime polymorphism Difference between static polymorphism and dynamic polymorphism Statically poly ...

This article mainly summarizes the basis of Go language and its related special grammar. Unlike Go build, Go run does not create executables. Therefore, in the development stage, use the command go run. When sharing after development, use Go build.At the beginning of its creation, Go language was used to develop high flow production system.In ...

Catalogue of series articles preface 🌲 1, Lua operator An operator is a special symbol that tells the interpreter to perform a specific mathematical or logical operation. Lua provides the following operator types:Arithmetic operatorRelational operatorLogical operatorOther Operators 🌲 1. Arithmetic operator 1. Grammar The ...

SpringBoot-21-Mybatis multiple data sources As we mentioned earlier, there are two ways to generate Mybatis Code: Mybatis Genenrator Mybatis code generation Mybtais Plus MyBatisPlus code generation The JdbcTemplate and spring boot data operation databases were also introduced earlier JdbcTemplate multi data source configuration Spring ...

enumerate() instead of range(len()) Problem: traverse a list and set the value less than 0 to 0. Traversing the list is an operation often involved in the development process. Most Python developers are used to using range(len()) syntax, which is introduced in many tutorials and books. Therefore, many students choose to use this method to tr ...

Generally, the form page needs to fill in the mobile phone number. To verify whether the mobile phone number entered by the user is correct, we need to use the regular expression to match the mobile phone number segment. If it is in the operator number segment, the number is correct. Therefore, it is necessary to know the latest segment number ...

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